Holly, 30, who is expecting a daughter in May, was under the care of doctors after falling ill on Saturday. Yesterday, in a phone call to Phillip Schofield live on air at This Morning, she told viewers:

'I feel much better today thank you,' before explaining, 'to be honest I'm not sure [what was wrong] I just felt really unwell on Saturday.'

The presenter went on to say she had been checked out at the hospital and found she was 'quite anaemic' and blamed that for the headaches she had been suffering.

'They gave me things to take which have eased the pain a bit but also made me quite sleepy. It was just one of those things really and another thing that comes with being pregnant.'

Miss Willoughby was hopeful of returning to the show and thanked everyone for their support and good wishes: 'I've had lots of messages too - so thank you to everybody. I'm better now so thank you very much.'